Political communication(s) is a subfield of communication and political science that is concerned with how information spreads and influences politics and policy makers, the news media and citizens. Since the advent of the World Wide Web, the amount of data to analyze has exploded, and researchers are shifting to computational methods to study the dynamics of political communication. In recent years, machine learning, natural language processing, and network analysis have become key tools in the subfield. It deals with the production, dissemination, procession and effects of information, both through mass media and interpersonally, within a political context. This includes the study of the media, the analysis of speeches by politicians and those that are trying to influence the political process, and formal and informal conversations among members of the public, among other aspects. The media acts as bridge between government and public. Political communication can be defined as the connection concerning politics and citizens and the interaction modes that connect these groups to each other. Whether the relationship is formed by the modes of persuasion, Pathos, Ethos or Logos.
The study and practice of political communication focuses on the ways and means of expression of a political nature. Robert E. Denton and Gary C. Woodward, two important contributors to the field, in Political Communication in America characterize it as the ways and intentions of message senders to influence the political environment. This includes public discussion (e.g. political speeches, news media coverage, and ordinary citizens' talk) that considers who has authority to sanction, the allocation of public resources, who has authority to make decision, as well as social meaning like what makes someone American. In their words "the crucial factor that makes communication 'political' is not the source of a message, but its content and purpose." David L. Swanson and Dan Nimmo, also key members of this sub-discipline, define political communication as "the strategic use of communication to influence public knowledge, beliefs, and action on political matters." They emphasize the strategic nature of political communication, highlighting the role of persuasion in political discourse. Brian McNair provides a similar definition when he writes that political communication is "purposeful communication about politics." For McNair this means that this not only covers verbal or written statements, but also visual representations such as dress, make-up, hairstyle or logo design. With other words, it also includes all those aspects that develop a "political identity" or "image". Reflecting on the relationship between political communication and contemporary agenda-building, Vian Bakir defines Strategic Political Communication (SPC) as comprising 'political communication that is manipulative in intent, that utilises social scientific techniques and heuristic devices to understand human motivation, human behavior and the media environment, to inform effectively what should be communicated – encompassing its detail and overall direction – and what should be withheld, with the aim of taking into account and influencing public opinion, and creating strategic alliances and an enabling environment for government policies – both at home and abroad'.